804564 has 18 divisors (see below), whose sum is σ = 2033850. Its totient is φ = 268176.

The previous prime is 804553. The next prime is 804571. The reversal of 804564 is 465408.

It can be written as a sum of positive squares in only one way, i.e., 562500 + 242064 = 750^2 + 492^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11139 + ... + 11210.

2⁸⁰⁴⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

804564 is an abundant number, since it is smaller than the sum of its proper divisors (1229286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

804564 is a wasteful number, since it uses less digits than its factorization.

804564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22359 (or 22354 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 804564 is about 896.9749160372. The cubic root of 804564 is about 93.0079771166.

The spelling of 804564 in words is "eight hundred four thousand, five hundred sixty-four".